Switching: Owning the Rails Under the BrandWide moat

Mastercard (MA) — moat facet

Mastercard earns more from running the transaction than from lending its brand to the card, and processing is the largest assessment line it has.

Mastercard is not only a brand on a card; it runs the computers that carry most of the transactions. Transaction processing assessments were $15,930 million in 2025, the largest of the four assessment lines1, and they rose from $13,602 million a year earlier2. Through the network Mastercard routes the transaction to the issuer for approval, then handles clearing and settlement between issuer and acquirer3.

Transaction processing assessments ($M)7,137202010,646202213,602202415,9302025Mastercard Forms 10-K FY2022 and FY2025 key metrics
The largest line more than doubled in five years.

This matters because a brand without switching is a licence, and licences can be renegotiated. When Mastercard carries the transaction it earns a fee on each one and sees the data it needs to sell fraud scoring and other services, which it applies to transactions in real time as they pass through the network4. The value-added services business described elsewhere in this app rests on that position.

Switching is also where regulators push hardest. European Union legislation requires Mastercard to separate its scheme activities from its switching activities5, which invites other processors to handle Mastercard-branded transactions. In the United States, debit routing rules let merchants send a debit payment down a rival network.

Switched transactions grew 10% in 20256 and 9% in the second quarter of 20267, a little faster than dollar volume, which says Mastercard is carrying a rising share of the transactions on its own cards.

The processing line also measures something the brand alone cannot: how much of the network's own traffic Mastercard actually carries. Switched transactions were 175.5 billion in 20258, and the company describes a network architecture that performs intelligent routing and applies services such as fraud scoring and tokenization to transactions in real time, with 24-hour availability9. That real-time position is what makes the services business possible. A brand that licensed its name to another processor would still collect assessments, but it would see the data second, and sell less.

Keep an eye on transaction processing assessments against gross dollar volume. If processing grows slower than volume for several years, someone else is carrying Mastercard-branded payments, and the most useful vantage point in the business is being given away.

Moat trajectory: Holding steady

Processing assessments grew 17% in 2025; Europe requires scheme and switch to be separated.

The number that tests this moat
Reported
Transaction processing assessments
$15,930M in 2025, up from $13,602M

The fee for carrying the transaction; growing slower than dollar volume would mean others are processing Mastercard-branded payments.

Source: Mastercard Form 10-K, FY2025 ↗
⚠ Threats to the moat
⚠ THREAT 01
Regulation II and the Routing Choice
The rule that decides who carries an American debit payment is being decided in court, and the two courts disagree.
References
  1. ReportedTransaction processing assessments were $15,930 million in 2025, the largest of the four assessment lines, and they rose from $13,602 million a year earlier.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: key metrics, assessments and rebates. — FY2025 · publ. 11 February 2026 · source ↗
  2. ReportedTransaction processing assessments were $15,930 million in 2025, the largest of the four assessment lines, and they rose from $13,602 million a year earlier.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: key metrics, assessments and rebates. — FY2025 · publ. 11 February 2026 · source ↗
  3. ReportedThrough the network Mastercard routes the transaction to the issuer for approval, then handles clearing and settlement between issuer and acquirer.
    Mastercard Form 10-K for fiscal 2025 - Item 1A risk factors and Note 19 legal and regulatory proceedings. — FY2025 · publ. 11 February 2026 · source ↗
  4. ReportedWhen Mastercard carries the transaction it earns a fee on each one and sees the data it needs to sell fraud scoring and other services, which it applies to transactions in real time as they pass through the network.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: value-added services and solutions. — FY2025 · publ. 11 February 2026 · source ↗
  5. ReportedEuropean Union legislation requires Mastercard to separate its scheme activities from its switching activities, which invites other processors to handle Mastercard-branded transactions.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: net revenue by category, key metrics, rebates, geography and the five largest customers. — FY2025 · publ. 11 February 2026 · source ↗
  6. ReportedSwitched transactions grew 10% in 2025 and 9% in the second quarter of 2026, a little faster than dollar volume, which says Mastercard is carrying a rising share of the transactions on its own cards.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: key metrics, assessments and rebates. — FY2025 · publ. 11 February 2026 · source ↗
  7. ReportedSwitched transactions grew 10% in 2025 and 9% in the second quarter of 2026, a little faster than dollar volume, which says Mastercard is carrying a rising share of the transactions on its own cards.
    Mastercard second-quarter 2026 results release, Form 8-K exhibit 99.1 - statements, cash flow, balance sheet and operating metrics by region. — Q2 2026 · publ. 30 July 2026 · source ↗
  8. ReportedSwitched transactions were 175.5 billion in 2025, and the company describes a network architecture that performs intelligent routing and applies services such as fraud scoring and tokenization to transactions in real time, with 24-hour availability.
    Mastercard Form 10-K for fiscal 2025 - Item 1 business: the network, competition, tokenization, account-based payments and human capital. — FY2025 · publ. 11 February 2026 · source ↗
  9. ReportedSwitched transactions were 175.5 billion in 2025, and the company describes a network architecture that performs intelligent routing and applies services such as fraud scoring and tokenization to transactions in real time, with 24-hour availability.
    Mastercard Form 10-K for fiscal 2025 - Item 1 business: the network, competition, tokenization, account-based payments and human capital. — FY2025 · publ. 11 February 2026 · source ↗
Sources
Generated September 25, 2026